Vanessa crossed her arms, before putting a hand through her hair, continuing to fix the wall with the old writings "We are very bored..." She sighed "If we come back like that...Gramps will give us a mountain of chores to do for disobeying him..." Sorey giggled nervously, touching the end of his long hair before putting a reassuring hand on Vanessa's back "There must be a way to find...our original bodies no ? Let's search on the walls" He laid a soft kiss on Vanessa's blushing cheek "Okay, even if I find that this experience...is rather rewarding to better understand each other"

Everything started from a discussion with a friend...and this is what results xD
Sorey and Vanessa going to the ruins that Gramps had forbidden them to visit...and they read an old text on a wall that changed their sex x)
A slightly different story, but based on ruins, is on my Tumblr ^^
Warning !!!
The story is a +18, I'll warn you ;)
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Sorey/Tales of Zestiria by Bandai Namco.
Vanessa and drawing by me  SkulblakaSaphira